Inexperience, then, but most of us can feel the case mouth hit a die and know something is off. The original RCBS carbide sizing dies has NO chamfer and you quickly learned to ease the case it.
In your case, I would assume that the first case hit and you, not knowing better, forced it. Simple and purely human action.
With a flared case mouth, you probably couldn't have gotten the case in the die.
In your case, I would assume that the first case hit and you, not knowing better, forced it. Simple and purely human action.
With a flared case mouth, you probably couldn't have gotten the case in the die.